I would not recommend fleece, not much warmth there. Take a look at Jacks R Better and Go Lite for some nice down or synthetic blanket/bag. I almost always recommend down over synthetic. Down is more compressible, provides higher loft per weight of insulation, has a wider temperature comfort range, and last longer than synthetic. Yes if it gets wet it looses insulation. But the chances of that happening are pretty remote in real world condition if you take minimal precaution and sleep in a tent.